Direct Sowing Culture Research Articles

Effects of Silicate Application on Lodging, Yield and Palatability of Rice Grown by Direct Sowing Culture.

The effects of silicon application on lodging, yield and palatability of rice grown in a low-SiO2 field by direct sowing culture were studied. The silicon application increased lodging resistance through increased breaking strength and increased pushing tolerance. It also increased the yield by increasing the percentages of ripened grains. The palatability of the rice grown with silicon applications tended to be superior to the rice grown without silicon application. The silicon applications lowered the protein contents in milled rice and increased the maximum viscosity. Therefore, it was concluded that the superiority of palatability under the direct sowing culture with silicon application was caused by the reduction of protein content and an increase in the maximum viscosity, which was closely related to the extent of grain filling. These effects were clearly observed by the application of 64gm-2 or more silicon.

Selection Effectiveness of Lodging Tolerance by using Pushing Resistance for Improving Rice Cultivar adapted to Direct Sowing Culture in Flooded Paddy Fields.

This study was undertaken to find the selection effectiveness of lodging tolerance by using pushing resistance for improving rice cultivar adapted to direct sowing culture in flooded paddy fields. The lines used in the experiment ware F4 and F5 breeding lines of Aoinokaze // Lemont / Hinohikari; 47 lines and Yumehikari // Lemont / Hinohikari; 29 lines that ware medium maturity lines. There was a significant negative correlation between the pushing resistance of F4 lines in transplanting culture and lodging degree of F5 lines in direct sowing culture. Even though the selection rate of pushing resistance in F4 was changing from 10% to 40%, thre was a distinct difference in lodging degree under direct sowing culture in F5. A few F5 lines selected by using pushing resistance in transplanting culture ware superior in lodging tolerance and yielding ability under direct sowing culture. There ware comparatively few deviations of yielding ability and grain quality by using pushing resistance for the selection of lodging tolerance in an early generation. These results lead to the conclusion that it is possible to breed high lodging tolerance cultivar adapted to direct sowing culture by using pushing resistance under transplanting culture in an early generation.

A Trial of Straw Mulching Direct Sowing Cultivation of Low-land Rice in an Irrigation Project in Ghana

A Trial of Straw Mulching Direct Sowing Cultivation of Low-land Rice in an Irrigation Project in Ghana

The Optimum Seeding Time on Direct Sowing Culture of Rice in Well-drained Paddy Field in Fukushima Prefecture

The Optimum Seeding Time on Direct Sowing Culture of Rice in Well-drained Paddy Field in Fukushima Prefecture

Adaptability of Leading Rice Varieties to Direct Sowing Culture of Rice in Well-drained Paddy Field in Fukushima Prefecture

Adaptability of Leading Rice Varieties to Direct Sowing Culture of Rice in Well-drained Paddy Field in Fukushima Prefecture

Growth Characteristics between Modes of Direct Sowing Culture in Flood Paddy Fields

Growth Characteristics between Modes of Direct Sowing Culture in Flood Paddy Fields

Emergence of Barnyardgrass in Direct Sowing Culture of Paddy Rice on Well-Drained Paddy Field

Emergence of Barnyardgrass in Direct Sowing Culture of Paddy Rice on Well-Drained Paddy Field

Method of Reducing Birds Damage on Direct Sowing Culture of Rice in Paddy Field

Method of Reducing Birds Damage on Direct Sowing Culture of Rice in Paddy Field

Studies on Direct Sowing Culture of Rice in Northern Kyushu. Effects of seedling establishment density and sowing styles on the growth and palatability of milled rice.

The purpose of this study was to clarify the effects of seedling establishment density and sowing styles on the growth, palatability, and physicochemical properties of milled rice under direct sowing culture in flooded paddy fields in northern Kyushu. The density of 80 seedlings/m2 under direct sowing culture was stable and more superior in lodging tolerance, yielding ability, palatability, and physicochemical properties of milled rice than other densities(i.e., 20, 40, 100, 150, and 200 seedlings/m2). Furthermore, the palatability(i.e., overall eating quality)of cooked rice showed a significant(p<0.01)negative correlation with the protein content of milled rice. Especially, the protein content of milled rice from 80 seedlings/m2 was lower than that of milled rice from other densities under different conditions such as production year and varieties. A comparative study with three sowing styles in hills, rows, and broadcast under direct sowing culture was made on the lodging tolerance, yielding ability and palatability of milled rice. The lodging tolerance of hill sowing was superior to the row and broadcast sowings. The yielding ability of hill and row sowings was superior to the broadcast sowing. On the other hand, no significant difference was noted among these three sowing styles in relation to the palatability and physicochemical properties of milled rice. Judging from the deterioration of palatability by lodging, we concluded that hill sowing was the most suitable and broadcast sowing the least suitable for direct sowing culture in flooded paddy fields.

Direct Sowing Culture of Rice in Paddy Field by Radio Controled Helicopter

Direct Sowing Culture of Rice in Paddy Field by Radio Controled Helicopter

The Effects of Soil Acidity upon Growth in Direct Sowing Culture of Paddy Rice on Well-drained Paddy Field

The Effects of Soil Acidity upon Growth in Direct Sowing Culture of Paddy Rice on Well-drained Paddy Field

Studies on Direct Sowing Culture of Rice in Northern Kyushu. III. Palatability and physicochemical properties of milled rice under direct sowing culture.

We aimed to clarify the palatability and physicochemical properties of milled rice under direct sowing Culture in comparison with those under a transplanting culture which had mostly the same ripening period as that of the direct sowing culture. The objective was the selection of a good eating-quality rice cultivar well adapted to the direct sowing culture in Northern Kyushu. Highly palatable cultivars under a transplanting culture showed relatively high palatability for milled rice under the direct sowing culture. The palatability under the direct sowing culture was superior to that under the transplanting culture. Cultivars with highly physicochemical properties under the transplanting culture showed relatively high physicochemical properties for milled rice under the direct sowing culture. The milled rice under the direct sowing culture showed a higher protein content, lower amylose content, and higher maximum viscosity and breakdown values than those under the transplanting culture. Although the directly seeded rice showed a lower yield than the transplanted rice due to the decreased number of panicles per m2, it showed heavier l000grain weight and a higher percentage of ripened grains than those of the transplanted rice. Therefore, it was concluded that the superiority of palatability under the direct sowing culture was caused by the reduction of amylose content and an increase in the maximum viscosity and breakdown values, which was closely related to the extent of grain filling under the direct sowing culture.

Progress and Prospect of the Research on Paddy Soil Management under Various Rice Growing System. : 4. Soil Management and Fertilization for Direct Sowing Culture of Rice in a Large-Scale Plot of Paddy Field

Progress and Prospect of the Research on Paddy Soil Management under Various Rice Growing System. : 4. Soil Management and Fertilization for Direct Sowing Culture of Rice in a Large-Scale Plot of Paddy Field

An Effective Measurement Method of Pushing Resistance for the Selecting of Rice Cultivar Well Adapted to Direct Sowing Culture in Transplanting.

An Effective Measurement Method of Pushing Resistance for the Selecting of Rice Cultivar Well Adapted to Direct Sowing Culture in Transplanting.

Studies on Direct Sowing Culture of Rice in Northern Kyushu. I. Evaluation of lodging tolerance.

北部九州において耐倒伏性を付与した直播用良食味品種を育成・選定するために, 湛水直播栽培における耐倒伏性の評価方法を検討した. 湛水直播栽培においては倒伏程度と稲体の支持力を表す押し倒し抵抗値とは相関が高く, 押し倒し抵抗値を用いて立毛状態で, 耐倒伏性の品種間差を評価できることが確認された. 湛水直播栽培における押し倒し抵抗値と移植栽培における押し倒し抵抗値の相関は高く, 移植栽培における押し倒し抵抗値と湛水直播栽培における倒伏程度の相関も高かった. したがって, 移植栽培条件下で押し倒し抵抗値を測定することにより, 湛水直播栽培条件下における倒伏程度を測定することが可能である. これらのことから, 耐倒伏性を付与した湛水直播用品種を育成する場合, 移植栽培条件下で押し倒し抵抗値を測定することにより, 直播栽培をせずに倒伏抵抗性の系統選抜が可能となり, 湛水直播用品種の育成・選抜の効率化が図られる.

Studies on Direct Sowing Culture of Rice in Northern Kyushu. II. Evaluation of lodging tolerance by crown root thickness during seedling stage.

This study was undertaken to find a method of evaluating lodging tolerance under direct sowing culture in flooded paddy field by the crown root thickness of seedlings for the selection of good eating quality rice cultivars well adapted to direct sowing in Northern Kyushu. The crown root thickness of seedling at 18 days after sowing showed a significant (p<0.01) positive correlation with the crown root thickness of thc plant at 15 days after heading under direct sowing culture. Also, crown root thickness of seedlings at 18, 20 and 30 days after sowing showed a significant (p<0.01, 0.05) negative correlation with lodging degree, and showed a significant (P<0.01, 0.05) positive correlation with the pushing resistance under direct sowing culture. On the other hand, there was no correlation between crown root thickness of seedlings at 10 or 12 days after sowing and lodging degree and pushing resistance. Furthermore, in the case of testing many good eating quality rice cultivars, crown root thickness of seedling at 30 days after sowing showed a significant (p<0.01) negative correlation with lodging degree and a significant (p<0.05) positive correlation with pushing resistance. In conclusion, we found that the lodging resistance of thc cultivars with thick roots at the seedling stage was generally resistant. This leads us to suppose the varieties with good eating quality adapted for direct sowing culture could be selected at the juvenile stage based on crown root thickness of seedlings.

Establishment of Direct Sowing Culture of Paddy Rice in Cold District. I. Enhanced establishment of seedling by water control and CaO2 during low temperature after sowing

Establishment of Direct Sowing Culture of Paddy Rice in Cold District. I. Enhanced establishment of seedling by water control and CaO₂ during low temperature after sowing

Effects of Rice Direct Sowing Culture in Family Farm

Effects of Rice Direct Sowing Culture in Family Farm

Occurence of Rice Blast Disease by Pyricularia oryzae Cavara in Direct Sowing Culture of Paddy Rice on Drained Field in Hachirogata Reclained Field

Occurence of Rice Blast Disease by <I>Pyricularia oryzae</I> Cavara in Direct Sowing Culture of Paddy Rice on Drained Field in Hachirogata Reclained Field

New Rice Direct Sowing culture Technique of Broadcasting Sprouted Seed onto Wet Soil(Courses of Developments in Low-cost Cultivation Techniques Represented by Direct Sowing of Paddy Rice and &quot;Nyuu-byou&quot; Transplanting)

New Rice Direct Sowing culture Technique of Broadcasting Sprouted Seed onto Wet Soil(Courses of Developments in Low-cost Cultivation Techniques Represented by Direct Sowing of Paddy Rice and &quot;Nyuu-byou&quot; Transplanting)