Rice carrying capacity and sustainable produce of rice in resources-limited regions

Rice is a main food over the world. With the growing population and urbanization, the demand for the rice is increasing.To ensure the sustainable produce and market supply of rice is most important to meet the people’s need of rice and the sustainable development. Most of distribution area of rice is in resources-limited regions, and sometime natural calamities infl uences rice yield,quality and market supply almost every year in resources-limited regions over the world. However, there are few reports of rice carrying capacity and sustainable produce of Rice. In this study,author review rice carrying capacity and sustainable produce of rice. In the near future, we should study the rice carrying capacity and regulated the relationship between nature resources and rice plant growth in the resources-limited regions at the right time to ensure the sustainable use of natural resources and sustainable produce of rice and market supply to serve sustainable development. Review Article Rice carrying capacity and sustainable produce of rice in resources-limited regions Zhongsheng Guo* Institute of Soil and Water Conservation, Northwestern A & F University, CAS & MWR, Yangling, China Received: 19 June, 2019 Accepted: 22 July, 2019 Published: 23 July, 2019 *Corresponding author: Zhongsheng Guo, Institute of Soil and Water Conservation, Northwestern A & F University, CAS & MWR, Yangling, 26 Xinong Road, Yangling, Shaanxi Province 712100, PR China, Tel: ++86-29-87012411; Fax: ++86-29-8701-2210; E-mail:

Rice (Oryza sativa L.) is one of the most important staple crops, feeding almost half of the world population. It is cultivated worldwide with a concentration in Asia. Rice domestication has greatly infl uenced the history and civilization of humans [1].
With the growing population and urbanization, the demand for the rice is increasing. But the rice production is not escalating at a requisite rate to keep up with the food demand because of the various environmental stresses. So it is very necessary to develop a technology to produce large amount of rice in the presence of multiple environmental stress conditions [2].
Yield and quality of rice is affected due to various biotic and abiotic stresses,which infl uence sustainable development.
Biotic stresses include weed, fowl and domestic animal eat rice and plant diseases and insect pests, we can accept the measures such as weeding, fence isolation, control plant diseases and insect pests. Abiotic stresses include drought, salinity and temperature so on. For abiotic stress, based on carrying capacity,we can accept regulate and control method to regulate the relationship between nature resources and rice plant growth and realize the sustainable use of nature resources and sustainable produce of rice because carrying capacity is the key problem of sustainable development. However, there is a few report of rice carrying capacity and the sustainable produce of rice. The purpose of the study is to introduce the rice carrying capacity and the sustainable produce of rice for better understanding the sustainable use of nature resources in resources-limited regions or the natural calamities happen and reduce of the effect of nature resource shortage on rice produce.

Power of plant self regulation
The growth response of rice to ecological environment has three elemental points: Highest, optimal and lowest point.
Along with plant growth, the the supply of nature resources reduce the thickness or intensity of nature resources deviate from the optimal point the stress of resources on rice growth increase.The rice plants tend to respond to stresses by activating signaling pathways. Different genes are up-and down-regulated in response to abiotic stress which initiates or inhibits various signaling processes and make the plant tolerate to stress conditions [3]. But, the power for some plant self-regulation is limit. When the the supply rate of nature resources reach to an intolerable degree, the resources and environment will infl uence rice growth, yield and benefi cial

Carrying capacity
Resource constraints set a maximum size that a population can safely attain. The carrying capacity is the maximum population that nature resources bear population, which is a key issue for sustainable development. The idea of carrying capacity has its origin in the doctrine of Thomas Robert Malthus, who considered that society had the ability to increase agricultural production only at an arithmetic rate but the number of people to be fed increased at a geometric rate. Therefore, to some degree, population was likely to exceed food supplies, with calamitous results [11].
The term carrying capacity was fi rst used by range managers [12] and U.S. Department of Agriculture researchers [13]. After Raymond Pearl and Lowell J. Reed proposed logistic equations in 1920, Eugene Odum [14,15], equated the term carrying capacity with the constant K in logistic equations, see Where N (t) is density at time t, the population per unit area at time t, r is the intrinsic growth rate, r > 0 and K is an asymptote (the carrying capacity) with K > 0.

Regulation of the relationship between natural resources and rice plant growth
The The infi ltration depth equals the distance from the surface to the crossover point between the two respective soil water distribution curves of soil water with soil depth before and after the rain event (fi gure 1). The MID will occur after a continuous heavy rainfall event and a long-term cumulative infi ltration process, and can be determined by a series of twocurve methods (fi gure 2) [6,7].

Study and look into the distance
As the climate warms, extreme climate disasters increase.
With the growing population and urbanization, the demand for the rice is increasing. But the rice production is not escalating